Use the following diagram for the next four questions. The particle models shown above represent a proposed two-step mechanism for the destruction of ozone (O3) in the upper atmosphere.
Based on the proposed mechanism, which of the following best describes the concentration of the species represented above as the reaction occurs?
A. The concentration is larger than that of reactant or product.
B. The concentration is very low for the duration of the reaction.
C. The concentration increases steadily as the reaction proceeds.
D. The concentration fluctuates between high and low during the reaction.

astronomers such as edwin hubble.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

hope this : )